unavailable to read file, never had this problem before. trying to upload my sony a7rii. Any info would help
Please tell us exactly what you are trying to do and any error messages.
i.e. trying to download from my card in the laptop card reader to the external drive attached. Lightroom says "Cannot write ..."
What version of Lightroom do you have. You will need a minimum of v6.1.1 to read RAW files from this camera.
If you don't have that minimum version you can either upgrade or download and convert to DNG using the Adobe DNG Converter if you are using an earlier version of Lightroom.